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71 lines
2.1 KiB
71 lines
2.1 KiB
// Copyright 2015 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package os
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import (
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"bufio"
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"regexp"
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"strings"
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"github.com/coreos/clair/worker/detectors"
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)
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var (
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osReleaseOSRegexp = regexp.MustCompile(`^ID=(.*)`)
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osReleaseVersionRegexp = regexp.MustCompile(`^VERSION_ID=(.*)`)
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)
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// OsReleaseOSDetector implements OSDetector and detects the OS from the
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// /etc/os-release and usr/lib/os-release files.
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type OsReleaseOSDetector struct{}
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func init() {
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detectors.RegisterOSDetector("os-release", &OsReleaseOSDetector{})
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}
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// Detect tries to detect OS/Version using "/etc/os-release" and "/usr/lib/os-release"
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// Typically for Debian / Ubuntu
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// /etc/debian_version can't be used, it does not make any difference between testing and unstable, it returns stretch/sid
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func (detector *OsReleaseOSDetector) Detect(data map[string][]byte) (OS, version string) {
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for _, filePath := range detector.GetRequiredFiles() {
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f, hasFile := data[filePath]
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if !hasFile {
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continue
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}
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scanner := bufio.NewScanner(strings.NewReader(string(f)))
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for scanner.Scan() {
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line := scanner.Text()
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r := osReleaseOSRegexp.FindStringSubmatch(line)
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if len(r) == 2 {
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OS = strings.Replace(strings.ToLower(r[1]), "\"", "", -1)
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}
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r = osReleaseVersionRegexp.FindStringSubmatch(line)
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if len(r) == 2 {
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version = strings.Replace(strings.ToLower(r[1]), "\"", "", -1)
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}
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}
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}
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return
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}
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// GetRequiredFiles returns the list of files that are required for Detect()
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func (detector *OsReleaseOSDetector) GetRequiredFiles() []string {
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return []string{"etc/os-release", "usr/lib/os-release"}
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}
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